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standard lazy types #2788

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Merged
merged 15 commits into from
Mar 30, 2023
Merged

standard lazy types #2788

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c2fddcc
standard lazy types
matklad Oct 17, 2019
0d2f664
Apply suggestions from code review
matklad Oct 18, 2019
34c70a4
remove numbers
matklad Oct 21, 2019
fe46a50
note that thread_local is not comming soon
matklad Oct 21, 2019
07c3c59
specify how we can add non-blocking `set` to libcore
matklad Oct 21, 2019
cc9aee8
specify that sync::OnceCell deadlocks when initialized reentrantly
matklad Oct 21, 2019
474a8bd
clarify that thread_local might not work out
matklad Oct 21, 2019
d459f2c
slightly more precise wording
matklad Oct 21, 2019
77ff080
avoid tearing of thread_locals
matklad Oct 26, 2019
19f6961
Fix typo
matklad Nov 9, 2019
b78c416
Mention that spinlocks are deliberately omitted
matklad Jan 12, 2020
4dc732e
Note Consume as an alternative to acquire
matklad Jan 12, 2020
2b31697
Mention conquer-once
matklad Jan 12, 2020
93231eb
Apply suggestions from tgross35's code review
tgross35 Dec 12, 2022
80a09d3
once_cell: adjust links to tracking issue
matklad Mar 30, 2023
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remove numbers
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@matklad
matklad committed Oct 21, 2019
commit 34c70a4d7956f7d42b51222f6b6c9d5dc4756828
2 changes: 1 addition & 1 deletion text/0000-standard-lazy-types.md
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Expand Up @@ -21,7 +21,7 @@ static BACKTRACE: Lazy<Option<String>> = Lazy::new(|| {
# Motivation
[motivation]: #motivation

Working with lazy initialized values is ubiquitous, [`lazy_static`] and [`lazycell`] crates have more than 20 million downloads combined.
Working with lazy initialized values is ubiquitous, [`lazy_static`] and [`lazycell`] crates are used throughout the ecosystem.
Although some of the popularity of `lazy_static` can be attributed to current limitations of constant evaluation in Rust, there are many cases when even perfect `const fn` can't replace lazy values.

At the same time, working with lazy values in Rust is not easy:
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